Abstract: A wire comprising a wire core with a surface, the wire core having a coating layer superimposed on its surface, wherein the wire core itself is a silver-based wire core, wherein the coating layer is a double-layer comprised of a 1 to 100 nm thick inner layer of nickel or palladium and an adjacent 1 to 250 nm thick outer layer of gold, characterized in that the wire exhibits a total carbon content of ?40 wt.-ppm.

Abstract: The application relates to a wind turbine component having an optical fiber sensor arranged to detect wind speed over the surface of the component. In one embodiment, the optical fiber sensor has a light loss portion that allows some of the light transmitted through the optical fiber to escape. The amount that the optical fiber bends in the air flow across the surface causes the effective surface area of the light loss portion to increase or decrease. With increased or decreased surface area of the light loss portion, more or less light is lost from the fiber. The intensity of the light transmitted in the fiber can therefore be used as a measure of the amount of bending, and therefore as a measure of the air flow's speed. In other embodiments, the optical fiber includes optical gratings, such as Fiber Bragg Gratings.

Abstract: The application relates to a wind turbine component 18 having an optical fibre sensor 10 arranged to detect the wind speed over the surface of the component. In one embodiment, the optical fibre sensor 10 has a light loss portion 15 that allows some of the light transmitted in the core 11 of the optical fibre to escape. The amount that the optical fibre bends in the air flow across the surface causes the effective surface area of the light loss portion 15 to increase or decrease. With increased or decreased surface area of the light loss portion, more or less light is lost from the fibre. The intensity of the light transmitted in the fibre can therefore be used as a measure of the amount of bending, and therefore as a measure of the air flow's speed. In other embodiments, the optical fibre can comprise optical gratings, such as Fibre Bragg Gratings or Long Period Gratings. Further embodiments use interferometry to measure the extension of the optical fibre.

Abstract: The invention involves a wind turbine comprising at least one blade (5) in turn comprising a blade body (501), lift-regulating means (502) adapted for movement in relation to the blade body (501) so as to regulate the lift of the blade, and load sensing means (5022, 506) for determining a load acting on the lift-regulating means (502), the wind turbine further comprising an actuation control unit (6) adapted to control the movement of the lift-regulating means (502) based on output from the load sensing means (5022, 506). In addition to output from the load sensing means (5022, 506), the actuation control unit (6) is adapted to control the movement of the lift-regulating means (502) based on the movement of the lift-regulating means (502).

Abstract: A wind turbine having at least one trailing edge control surface (10) on at least one rotor blade (5) is operated in a first mode, in which a rotor blade angle of attack and a trailing edge control surface deflection are set according to one or more wind turbine control parameters. The turbine is selectively operated in a second, noise reduced, mode, in which for a given set of wind turbine control parameters, the trailing edge control surface deflection is increased towards the pressure side and the rotor blade angle of attack is decreased with respect to the first mode. In the second mode, for a given set of control parameters, the loading on the blade (5) is on average closer to a hub than in the first operating mode.

Abstract: A sensor system for measuring aerodynamic loads acting on a wind turbine rotor blade is disclosed. The measured aerodynamic loads can be converted to an angle of attack of the resulting wind which flows past the moving rotor blade. The sensor is realized as a trailing edge flap which is elastically moveable relative the main part of the wind turbine blade. By measuring motion of the trailing edge flap or corresponding motions of components of the sensor system, the aerodynamic forces acting on the blade can be determined. Due to the relative small dimensions of the sensor flap and the relative small displacements of the flap, the sensor system only affects the aerodynamic properties insignificantly.

Abstract: The invention involves a wind turbine comprising at least one blade (5) in turn comprising a blade body (501), lift-regulating means (502) adapted for movement in relation to the blade body (501) so as to regulate the lift of the blade, and load sensing means (5022, 506) for determining a load acting on the lift-regulating means (502), the wind turbine further comprising an actuation control unit (6) adapted to control the movement of the lift-regulating means (502) based on output from the load sensing means (5022, 506). In addition to output from the load sensing means (5022, 506), the actuation control unit (6) is adapted to control the movement of the lift-regulating means (502) based on the movement of the lift-regulating means (502).

Abstract: A sensor system for measuring aerodynamic loads acting on a wind turbine rotor blade is disclosed. The measured aerodynamic loads can be converted to an angle of attack of the resulting wind which flows past the moving rotor blade. The sensor is realised as a trailing edge flap which is elastically moveable relative the main part of the wind turbine blade. By measuring motion of the trailing edge flap or corresponding motions of components of the sensor system, the aerodynamic forces acting on the blade can be determined. Due to the relative small dimensions of the sensor flap and the relative small displacements of the flap, the sensor system only affects the aerodynamic properties insignificantly.

Abstract: A wind turbine blade includes a blade body and lift-regulating mechanism adapted for movement in relation to the blade body by at least one actuation mechanism controlled by an actuation controller. The actuation controller controls a setting of the lift-regulating mechanism based on an input from a sensor, and the sensor is a force sensor adapted for sensing a force from a wind flow acting on the lift-regulating mechanism, whereby a wind turbine blade with fast-responding lift-regulating mechanism is provided.